Led-filament and lighting device comprising the led-filament

Abstract

A LED-filament ( 11 ) is provided. The LED-filament comprises a substrate ( 12 ) having an elongated body with an extension along an elongation axis (A); a plurality of LEDs ( 13 ) mechanically coupled to the substrate; and a communication element ( 14 ) mechanically coupled to the LED-filament, the communication element is configured for wireless communication. Also a lighting device is provided. The lighting device comprises the LED-filament ( 11 ); and a controller ( 16 ) configured to control the plurality of LEDs with respect to characteristics of light emitted by the plurality of LEDs, wherein the communication element is communicatively coupled to the controller, and wherein the controller is configured to receive a control signal from the communication element for controlling operation of the plurality of LEDs.

1 . A LED-filament comprising:
 a substrate having an elongated body with an extension along an elongation axis (A);   a plurality of LEDs mechanically coupled to the substrate;   wiring for powering the plurality of LEDs; and   a communication element mechanically coupled to the LED-filament, the communication element is configured for wireless communication; and   wherein the communication element is different from the wiring;   wherein the LED-filament further comprises an encapsulation encapsulating the substrate and the plurality of LEDs, wherein the communication element is integrated within the encapsulation, partly integrated into the encapsulation, or arranged on the encapsulation; and   wherein the encapsulant comprises a wavelength converting material.   
     
     
         2 . The LED-filament according to  claim 1 , wherein the communication element is arranged on the substrate. 
     
     
         3 . The LED-filament according to  claim 1 , wherein the substrate has first and second surfaces, wherein the plurality of LEDs are arranged on the first surface of the substrate and the communication element is arranged on the second surface of the substrate. 
     
     
         4 . The LED-filament according to  claim 3 , wherein the first and second surfaces are opposite each other. 
     
     
         5 . The LED-filament according to  claim 1 , wherein the plurality of LEDs and the communication element is arranged on a common surface of the substrate. 
     
     
         6 . The LED-filament according to  claim 1 , wherein the substrate comprises a groove, a through hole, or a protrusion, wherein the communication element is arranged in the groove, in through hole, or on the protrusion. 
     
     
         7 . (canceled) 
     
     
         8 . The LED-filament according to  claim 1 , wherein the plurality of LEDs are arranged along a line having an extension parallel with the elongation axis (A). 
     
     
         9 . The LED-filament according to  claim 1 , wherein the communication element is positioned other than directly opposite any one of the plurality of LEDs, or other than on top of any one of the plurality of LEDs. 
     
     
         10 . The LED-filament according to  claim 1 , wherein the communication element is having an extension parallel with the elongation axis (A). 
     
     
         11 . The LED-filament ( 11 ) according to  claim 1 , wherein the communication element at least partly surrounds the plurality of LEDs. 
     
     
         12 . The LED-filament according to  claim 1 , wherein the communication element is having a meandering extension along the elongation axis (A). 
     
     
         13 . The LED-filament according to  claim 1 , wherein the LED-filament further comprises an encapsulation encapsulating the substrate and the plurality of LEDs, wherein the communication element is wounded around the encapsulation. 
     
     
         14 . A lighting device comprising:
 a LED-filament according to  claim 1 ; and   a controller configured to control the LED-filament with respect to characteristics of light emitted by the LED-filament,   wherein the communication element is communicatively coupled to the controller, and   wherein the controller is configured to receive a control signal from the communication element for controlling operation of the LED-filament.   
     
     
         15 . The lighting device according to  claim 13  comprising a plurality of LED-filaments, wherein the communication elements of the plurality of LED-filaments are interconnected forming a common communication element.